MASS SPECTROMETRIC STUDY OF RARE EARTH-CARBON SYSTEMS. I. THE CERIUM-CARBON SYSTEM. II. ATOMIZATION ENERGY OF THE NDC4 MOLECULE.
Abstract
The gaseous phase in thermodynamic equilibrium with the condensed cerium-carbon system was investigated by means of the combined Knudsen cell-mass spectrometric technique in the temperature range 1990-2300K. In addition to cerium atoms, the gaseous carbide molecules CeC2 and CeC4 were identified and their partial pressures measured. Using these informations the following dissociation and atomization energies were derived: 163 plus or minus 2 kcal/mole for the Ce-C2 bond energy; 305 plus or minus 1.5 kcal/mole for the atomization energy for CeC2; 609 plus or minus kcal/mole for the atomization energy of CeC4. In the temperature range 2210-2350K the NdC4 molecule was identified in the vapor in equilibrium with the Nd-C condensed system and its atomization energy was calculated to be 596 plus or minus 5 kcal/mole. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0825266
Entities
People
- A. Capalbi
- G. Balducci
- G. Demaria
- M. Guido
Organizations
- Sapienza University of Rome